Sildenafil Citrate (generic viagra) allows more blood flow into male reproductive system keeping stiff state of male reproductive organ when a man is stimulated or making love. The arteries in the male reproductive system get enlarged resulting in a hard-on. If this mechanism doesn't work properly then a man has difficulties in having and keeping stiff state of male organ during sexual encounter. Using sildenafil citrate, a man can respond to stimulation during a love-making encounter and once it is over the stiffness subsides.
With the intake of generic viagra, you must be aroused to get an erection. If you take this medication and are not stimulated, nothing will happen. You won't get an effect just by taking the pill, you need to be sexually aroused for getting hard on. Sildenafil citrate is a prescription tablet that can improve the function of male reproductive organ of men with impotency problem.